<template>
    <view class="uni-calendar">
        <view
            v-if="!insert && show"
            class="uni-calendar__mask"
            :class="{ 'uni-calendar--mask-show': aniMaskShow }"
            @click="clean"
        ></view>
        <view
            v-if="insert || show"
            class="uni-calendar__content"
            :class="{ 'uni-calendar--fixed': !insert, 'uni-calendar--ani-show': aniMaskShow }"
        >
            <view v-if="!insert" class="uni-calendar__header uni-calendar--fixed-top">
                <view class="uni-calendar__header-btn-box" @click="close">
                    <text class="uni-calendar__header-text uni-calendar--fixed-width">{{ cancelText }}</text>
                </view>
                <view class="uni-calendar__header-btn-box" @click="confirm">
                    <text class="uni-calendar__header-text uni-calendar--fixed-width">{{ okText }}</text>
                </view>
            </view>
            <view class="uni-calendar__header">
                <view class="uni-calendar__header-btn-box" @click.stop="pre">
                    <view class="uni-calendar__header-btn uni-calendar--left"></view>
                </view>
                <picker mode="date" :value="date" fields="month" @change="bindDateChange">
                    <text class="uni-calendar__header-text">{{
                        (nowDate.year || "") + " / " + (nowDate.month || "")
                    }}</text>
                </picker>
                <view class="uni-calendar__header-btn-box" @click.stop="next">
                    <view class="uni-calendar__header-btn uni-calendar--right"></view>
                </view>
                <text class="uni-calendar__backtoday" @click="backToday">{{ todayText }}</text>
            </view>
            <view class="uni-calendar__box">
                <view v-if="showMonth" class="uni-calendar__box-bg">
                    <text class="uni-calendar__box-bg-text">{{ nowDate.month }}</text>
                </view>
                <view class="uni-calendar__weeks">
                    <view class="uni-calendar__weeks-day">
                        <text class="uni-calendar__weeks-day-text">{{ SUNText }}</text>
                    </view>
                    <view class="uni-calendar__weeks-day">
                        <text class="uni-calendar__weeks-day-text">{{ monText }}</text>
                    </view>
                    <view class="uni-calendar__weeks-day">
                        <text class="uni-calendar__weeks-day-text">{{ TUEText }}</text>
                    </view>
                    <view class="uni-calendar__weeks-day">
                        <text class="uni-calendar__weeks-day-text">{{ WEDText }}</text>
                    </view>
                    <view class="uni-calendar__weeks-day">
                        <text class="uni-calendar__weeks-day-text">{{ THUText }}</text>
                    </view>
                    <view class="uni-calendar__weeks-day">
                        <text class="uni-calendar__weeks-day-text">{{ FRIText }}</text>
                    </view>
                    <view class="uni-calendar__weeks-day">
                        <text class="uni-calendar__weeks-day-text">{{ SATText }}</text>
                    </view>
                </view>
                <view v-for="(item, weekIndex) in weeks" :key="weekIndex" class="uni-calendar__weeks">
                    <view v-for="(weeks, weeksIndex) in item" :key="weeksIndex" class="uni-calendar__weeks-item">
                        <calendar-item
                            class="uni-calendar-item--hook"
                            :weeks="weeks"
                            :calendar="calendar"
                            :selected="selected"
                            :lunar="lunar"
                            @change="choiceDate"
                        ></calendar-item>
                    </view>
                </view>
            </view>
        </view>
    </view>
</template>

<script>
import Calendar from "./util.js";
import CalendarItem from "./uni-calendar-item.vue";

import { initVueI18n } from "@dcloudio/uni-i18n";
import i18nMessages from "./i18n/index.js";
const { t } = initVueI18n(i18nMessages);

/**
 * Calendar 日历
 * @description 日历组件可以查看日期，选择任意范围内的日期，打点操作。常用场景如：酒店日期预订、火车机票选择购买日期、上下班打卡等
 * @tutorial https://ext.dcloud.net.cn/plugin?id=56
 * @property {String} date 自定义当前时间，默认为今天
 * @property {Boolean} lunar 显示农历
 * @property {String} startDate 日期选择范围-开始日期
 * @property {String} endDate 日期选择范围-结束日期
 * @property {Boolean} range 范围选择
 * @property {Boolean} insert = [true|false] 插入模式,默认为false
 * 	@value true 弹窗模式
 * 	@value false 插入模式
 * @property {Boolean} clearDate = [true|false] 弹窗模式是否清空上次选择内容
 * @property {Array} selected 打点，期待格式[{date: '2019-06-27', info: '签到', data: { custom: '自定义信息', name: '自定义消息头',xxx:xxx... }}]
 * @property {Boolean} showMonth 是否选择月份为背景
 * @event {Function} change 日期改变，`insert :ture` 时生效
 * @event {Function} confirm 确认选择`insert :false` 时生效
 * @event {Function} monthSwitch 切换月份时触发
 * @example <uni-calendar :insert="true":lunar="true" :start-date="'2019-3-2'":end-date="'2019-5-20'"@change="change" />
 */
export default {
    components: {
        CalendarItem
    },
    props: {
        date: {
            type: String,
            default: ""
        },
        selected: {
            type: Array,
            default() {
                return [];
            }
        },
        lunar: {
            type: Boolean,
            default: false
        },
        startDate: {
            type: String,
            default: ""
        },
        endDate: {
            type: String,
            default: ""
        },
        range: {
            type: Boolean,
            default: false
        },
        insert: {
            type: Boolean,
            default: true
        },
        showMonth: {
            type: Boolean,
            default: true
        },
        clearDate: {
            type: Boolean,
            default: true
        }
    },
    emits: ["close", "confirm", "change", "monthSwitch"],
    data() {
        return {
            show: false,
            weeks: [],
            calendar: {},
            nowDate: "",
            aniMaskShow: false
        };
    },
    computed: {
        /**
         * for i18n
         */

        okText() {
            return t("uni-calender.ok");
        },
        cancelText() {
            return t("uni-calender.cancel");
        },
        todayText() {
            return t("uni-calender.today");
        },
        monText() {
            return t("uni-calender.MON");
        },
        TUEText() {
            return t("uni-calender.TUE");
        },
        WEDText() {
            return t("uni-calender.WED");
        },
        THUText() {
            return t("uni-calender.THU");
        },
        FRIText() {
            return t("uni-calender.FRI");
        },
        SATText() {
            return t("uni-calender.SAT");
        },
        SUNText() {
            return t("uni-calender.SUN");
        }
    },
    watch: {
        date(newVal) {
            // this.cale.setDate(newVal)
            this.init(newVal);
        },
        startDate(val) {
            this.cale.resetSatrtDate(val);
            this.cale.setDate(this.nowDate.fullDate);
            this.weeks = this.cale.weeks;
        },
        endDate(val) {
            this.cale.resetEndDate(val);
            this.cale.setDate(this.nowDate.fullDate);
            this.weeks = this.cale.weeks;
        },
        selected(newVal) {
            this.cale.setSelectInfo(this.nowDate.fullDate, newVal);
            this.weeks = this.cale.weeks;
        }
    },
    created() {
        this.cale = new Calendar({
            selected: this.selected,
            startDate: this.startDate,
            endDate: this.endDate,
            range: this.range
        });
        this.init(this.date);
    },
    methods: {
        // 取消穿透
        clean() {},
        bindDateChange(e) {
            const value = e.detail.value + "-1";
            this.setDate(value);

            const { year, month } = this.cale.getDate(value);
            this.$emit("monthSwitch", {
                year,
                month
            });
        },
        /**
         * 初始化日期显示
         * @param {Object} date
         */
        init(date) {
            this.cale.setDate(date);
            this.weeks = this.cale.weeks;
            this.nowDate = this.calendar = this.cale.getInfo(date);
        },
        /**
         * 打开日历弹窗
         */
        open() {
            // 弹窗模式并且清理数据
            if (this.clearDate && !this.insert) {
                this.cale.cleanMultipleStatus();
                // this.cale.setDate(this.date)
                this.init(this.date);
            }
            this.show = true;
            this.$nextTick(() => {
                setTimeout(() => {
                    this.aniMaskShow = true;
                }, 50);
            });
        },
        /**
         * 关闭日历弹窗
         */
        close() {
            this.aniMaskShow = false;
            this.$nextTick(() => {
                setTimeout(() => {
                    this.show = false;
                    this.$emit("close");
                }, 300);
            });
        },
        /**
         * 确认按钮
         */
        confirm() {
            this.setEmit("confirm");
            this.close();
        },
        /**
         * 变化触发
         */
        change() {
            if (!this.insert) return;
            this.setEmit("change");
        },
        /**
         * 选择月份触发
         */
        monthSwitch() {
            let { year, month } = this.nowDate;
            this.$emit("monthSwitch", {
                year,
                month: Number(month)
            });
        },
        /**
         * 派发事件
         * @param {Object} name
         */
        setEmit(name) {
            let { year, month, date, fullDate, lunar, extraInfo } = this.calendar;
            this.$emit(name, {
                range: this.cale.multipleStatus,
                year,
                month,
                date,
                fulldate: fullDate,
                lunar,
                extraInfo: extraInfo || {}
            });
        },
        /**
         * 选择天触发
         * @param {Object} weeks
         */
        choiceDate(weeks) {
            if (weeks.disable) return;
            this.calendar = weeks;
            // 设置多选
            this.cale.setMultiple(this.calendar.fullDate);
            this.weeks = this.cale.weeks;
            this.change();
        },
        /**
         * 回到今天
         */
        backToday() {
            const nowYearMonth = `${this.nowDate.year}-${this.nowDate.month}`;
            const date = this.cale.getDate(new Date());
            const todayYearMonth = `${date.year}-${date.month}`;

            this.init(date.fullDate);

            if (nowYearMonth !== todayYearMonth) {
                this.monthSwitch();
            }

            this.change();
        },
        /**
         * 上个月
         */
        pre() {
            const preDate = this.cale.getDate(this.nowDate.fullDate, -1, "month").fullDate;
            this.setDate(preDate);
            this.monthSwitch();
        },
        /**
         * 下个月
         */
        next() {
            const nextDate = this.cale.getDate(this.nowDate.fullDate, +1, "month").fullDate;
            this.setDate(nextDate);
            this.monthSwitch();
        },
        /**
         * 设置日期
         * @param {Object} date
         */
        setDate(date) {
            this.cale.setDate(date);
            this.weeks = this.cale.weeks;
            this.nowDate = this.cale.getInfo(date);
        }
    }
};
</script>

<style lang="scss" scoped>
$uni-bg-color-mask: rgba(
    $color: #000000,
    $alpha: 0.4
);
$uni-border-color: #ededed;
$uni-text-color: #333;
$uni-bg-color-hover: #f1f1f1;
$uni-font-size-base: 14px;
$uni-text-color-placeholder: #808080;
$uni-color-subtitle: #555555;
$uni-text-color-grey: #999;
.uni-calendar {
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: column;
}

.uni-calendar__mask {
    position: fixed;
    bottom: 0;
    top: 0;
    left: 0;
    right: 0;
    background-color: $uni-bg-color-mask;
    transition-property: opacity;
    transition-duration: 0.3s;
    opacity: 0;
    /* #ifndef APP-NVUE */
    z-index: 99;
    /* #endif */
}

.uni-calendar--mask-show {
    opacity: 1;
}

.uni-calendar--fixed {
    position: fixed;
    /* #ifdef APP-NVUE */
    bottom: 0;
    /* #endif */
    left: 0;
    right: 0;
    transition-property: transform;
    transition-duration: 0.3s;
    transform: translateY(460px);
    /* #ifndef APP-NVUE */
    bottom: calc(var(--window-bottom));
    z-index: 99;
    /* #endif */
}

.uni-calendar--ani-show {
    transform: translateY(0);
}

.uni-calendar__content {
    background-color: #fff;
}

.uni-calendar__header {
    position: relative;
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: row;
    justify-content: center;
    align-items: center;
    height: 50px;
    border-bottom-color: $uni-border-color;
    border-bottom-style: solid;
    border-bottom-width: 1px;
}

.uni-calendar--fixed-top {
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: row;
    justify-content: space-between;
    border-top-color: $uni-border-color;
    border-top-style: solid;
    border-top-width: 1px;
}

.uni-calendar--fixed-width {
    width: 50px;
}

.uni-calendar__backtoday {
    position: absolute;
    right: 0;
    top: 25rpx;
    padding: 0 5px;
    padding-left: 10px;
    height: 25px;
    line-height: 25px;
    font-size: 12px;
    border-top-left-radius: 25px;
    border-bottom-left-radius: 25px;
    color: $uni-text-color;
    background-color: $uni-bg-color-hover;
}

.uni-calendar__header-text {
    text-align: center;
    width: 100px;
    font-size: $uni-font-size-base;
    color: $uni-text-color;
}

.uni-calendar__header-btn-box {
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: row;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
}

.uni-calendar__header-btn {
    width: 10px;
    height: 10px;
    border-left-color: $uni-text-color-placeholder;
    border-left-style: solid;
    border-left-width: 2px;
    border-top-color: $uni-color-subtitle;
    border-top-style: solid;
    border-top-width: 2px;
}

.uni-calendar--left {
    transform: rotate(-45deg);
}

.uni-calendar--right {
    transform: rotate(135deg);
}

.uni-calendar__weeks {
    position: relative;
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: row;
}

.uni-calendar__weeks-item {
    flex: 1;
}

.uni-calendar__weeks-day {
    flex: 1;
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 45px;
    border-bottom-color: #f5f5f5;
    border-bottom-style: solid;
    border-bottom-width: 1px;
}

.uni-calendar__weeks-day-text {
    font-size: 14px;
}

.uni-calendar__box {
    position: relative;
}

.uni-calendar__box-bg {
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    justify-content: center;
    align-items: center;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.uni-calendar__box-bg-text {
    font-size: 200px;
    font-weight: bold;
    color: $uni-text-color-grey;
    opacity: 0.1;
    text-align: center;
    /* #ifndef APP-NVUE */
    line-height: 1;
    /* #endif */
}
</style>
